US4823751A - Control apparatus for an injection pump - Google Patents

Control apparatus for an injection pump Download PDF

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Publication number
US4823751A
US4823751A US07/072,132 US7213287A US4823751A US 4823751 A US4823751 A US 4823751A US 7213287 A US7213287 A US 7213287A US 4823751 A US4823751 A US 4823751A
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US
United States
Prior art keywords
control device
shut
digital control
motor
output setting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/072,132
Inventor
Manfred Pfalzgraf
Bernward Stoll
Kurt Probst
Heinz-Friedrich Ohm
Andreas Wokan
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Mannesmann VDO AG
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Mannesmann VDO AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Assigned to VDO ADOLF SCHINDLING AG reassignment VDO ADOLF SCHINDLING AG ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: OHM, HEINZ-FRIEDRICH, PFALZGRAF, MANFRED, PROBST, KURT, STOLL, BERNWARD, WOKAN, ANDREAS
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F02D11/107—Safety-related aspects
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D2041/224—Diagnosis of the fuel system
    • F02D2041/226—Fail safe control for fuel injection pump

Definitions

  • the invention relates to control apparatus for an injection pump of a diesel motor, whereby the injection pump has a power setting element and a shut-off element, whereby further, the output setting element is regulatable by a digital control device.
  • a control apparatus wherein a shut-off element (10) is pulsatingly regulatable by a digital control device (1) such that a predetermined rotational speed of the diesel motor is achieved.
  • the digital control device and the shut-off element (10) form a two point controller. In this manner it is possible in a simple manner to maintain the predetermined rotational speed value to the required precision.
  • shut-off element can be constructed in connection with a coordinated setting element such that with sufficiently high cycle frequency, a rotational speed is obtained from the average or mean value of the pulses.
  • Another feature of the invention is that the pulsating control of the shut-off element (10) is releasable by a defect with a regulating of the output setting element. In this manner, automatically, for the case of a defect inside of the apparatus, which apparatus is formed by the digital control device and the output setting element, the rotational speed of the motor is reduced to a non-critical value.
  • the apparatus of the invention however can be expanded in the manner that the pulsing regulation of the shut-off element (10) is releasable upon exceeding of the permissable service operating conditions. In this way, even without the occurrence of an error in the digital control device or with the output setting element, a limitation of the motor output speed takes place, for example to maximum speed of the vehicle or respective maximum rotational speed.
  • a device (11) for connection of a signal, emitted by the digital control device (1), with a signal provided further for turning off the diesel motor is connected between an output, provided for the shut-off element (10), of the digital control device (1) and the shut-off element (10). In this manner a turning off of the motor independently of the digital control device is possible at any time.
  • a digital control device 1 is connected with a setting element 2 which is a per se known manner comprises an electric motor with a following transmission.
  • the setting element 2 is connected to the output setting element 4 of an injection pump 5 of a diesel motor (not illustrated).
  • the digital control device To the digital control device there is fed a desired value for the motor output by a gas pedal 6. Furthermore the digital control device is connected to a transmitter 7, 8 for the rotational speed n and the vehicular speed v.
  • the drawing shows that with the aid of a diode 11, the signal fed from the digital control device 1 to the setting member 9 can be applied with a further signal fed at 12, whereby the signal fed at 12 has priority. In this manner it is possible, without consideration on the digital control device as well as possibly error operating functions to the same, to turn off the motor.
  • the apparatus in accordance with the present invention can also be used for limiting the rotational speed of the motor or velocity.
  • a correspondingly changed or completed program is to be provided in the digital control device so that the shut-off mechanism 10 is actuated, not only upon a defect, but also in normal service upon exceeding the permissable operating conditions, for example the permissable speed.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)

Abstract

In an apparatus operable with an injection pump of a diesel motor whereby the injection pump has an output setting element and a shut-off element, the output setting element is controllable by a digital control device. Also, the shut-off element is pulsatingly controllable by the digital control device such that a predetermined rotational speed of the diesel motor is achieved.

Description

FIELD AND BACKGROUND OF THE INVENTION
The invention relates to control apparatus for an injection pump of a diesel motor, whereby the injection pump has a power setting element and a shut-off element, whereby further, the output setting element is regulatable by a digital control device.
Considering the control of output elements of injection pumps with the help of digital control devices in situations wherein a fault is present, for example with a jamming in the load position, there is provided an emergency stop function in known systems for avoiding critical operating conditions. In addition a shut-off element, located also on the injection pump, is actuated.
By turning off the motor, however, the critical operating condition is not eliminated, but rather by a resulting failure of servo and auxiliary devices, further critical conditions occur.
SUMMARY OF THE INVENTION
It is an objective of the invention to deal with a defect in the area of control of the output setting element of an injection pump to make it possible for the motor to run further with a non-critical rotational speed.
In accordance with the invention there is provided a control apparatus wherein a shut-off element (10) is pulsatingly regulatable by a digital control device (1) such that a predetermined rotational speed of the diesel motor is achieved.
In accordance with a further feature of the invention the digital control device and the shut-off element (10) form a two point controller. In this manner it is possible in a simple manner to maintain the predetermined rotational speed value to the required precision.
Instead of the two-point controller, also by using a suitable positioning member and by a suitable cycle frequency, a linear setting behavior can be achieved. In addition the shut-off element can be constructed in connection with a coordinated setting element such that with sufficiently high cycle frequency, a rotational speed is obtained from the average or mean value of the pulses.
Another feature of the invention is that the pulsating control of the shut-off element (10) is releasable by a defect with a regulating of the output setting element. In this manner, automatically, for the case of a defect inside of the apparatus, which apparatus is formed by the digital control device and the output setting element, the rotational speed of the motor is reduced to a non-critical value.
The apparatus of the invention however can be expanded in the manner that the pulsing regulation of the shut-off element (10) is releasable upon exceeding of the permissable service operating conditions. In this way, even without the occurrence of an error in the digital control device or with the output setting element, a limitation of the motor output speed takes place, for example to maximum speed of the vehicle or respective maximum rotational speed.
Further according to a feature of the invention, a device (11) for connection of a signal, emitted by the digital control device (1), with a signal provided further for turning off the diesel motor, is connected between an output, provided for the shut-off element (10), of the digital control device (1) and the shut-off element (10). In this manner a turning off of the motor independently of the digital control device is possible at any time.
Further, according to the invention it is possible to store various predetermined rotational speeds in the digital control device (1), to which rotational speeds the motor is controlled, depending upon the type of the existing defect or depending on other circumstances.
The invention permits of numerous embodiments.
BRIEF DESCRIPTION OF THE DRAWING
With the above and other objects and advantages in view, the present invention will become more clearly understood in connection with the detailed description of a preferred embodiment, when considered with the accompanying drawing, of which:
the only figure is a schematic illustration of the device of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to the drawing, a digital control device 1 is connected with a setting element 2 which is a per se known manner comprises an electric motor with a following transmission. By means of rods or a linkage 3, the setting element 2 is connected to the output setting element 4 of an injection pump 5 of a diesel motor (not illustrated). The setting range of the setting member 2 and of the output setting element 4 extends between LL=idling and VL=full load.
To the digital control device there is fed a desired value for the motor output by a gas pedal 6. Furthermore the digital control device is connected to a transmitter 7, 8 for the rotational speed n and the vehicular speed v.
In the per se known digital control device 1, now by corresponding programming or circuitry, devices are provided which permit recognition of an error inside a control circuit. As soon as such an error occurs, the shut-off mechanism 10 of the injection pump 5 is actuated via a further setting element 9 for turning off the motor. However, as soon as the rotational speed n falls under a predetermined value, the shut-off mechanism is further opened via the setting member 9. In this manner a rotational speed corresponding to the prescribed allowed speed is adjusted.
The drawing shows that with the aid of a diode 11, the signal fed from the digital control device 1 to the setting member 9 can be applied with a further signal fed at 12, whereby the signal fed at 12 has priority. In this manner it is possible, without consideration on the digital control device as well as possibly error operating functions to the same, to turn off the motor.
As already mentioned above, the apparatus in accordance with the present invention can also be used for limiting the rotational speed of the motor or velocity. In addition a correspondingly changed or completed program is to be provided in the digital control device so that the shut-off mechanism 10 is actuated, not only upon a defect, but also in normal service upon exceeding the permissable operating conditions, for example the permissable speed.
While there has been disclosed one embodiment of the invention, it is to be understood that this embodiment is provided by example only and not in a limiting sense.

Claims (13)

We claim:
1. An apparatus operable with an injection pump of a diesel motor, wherein the injection pump has a power output setting element and a fuel shut-off element, each of said elements comprising a mechanical actuator, and wherein further the output setting element is regulatable by a digital control device, the apparatus further comprising the digital control device; and wherein
the shut-off element is pulsatingly controllable from the digital control device to attain a predetermined rotational speed of the diesel motor; pulsating control by the digital control device being operative, upon indication of defect in control of the output setting element, to command the shut-off element to shut off the motor until motor rotation drops below a predetermined value of rotation, after which drop in motor rotation the digital control device commands the shut-off element to admit sufficient fuel to maintain a reduced speed of motor rotation.
2. The apparatus according to claim 1, wherein
the digital control device and the shut-off element form a two point controller.
3. The apparatus according to claim 1, further comprising
a positioning member operable with a suitable engine cycle frequency for achieving a linear setting behavior.
4. The apparatus according to claim 1, wherein
the pulsating control of the shut-off element is releasable by a defect with a control of the output setting element.
5. The apparatus according to claim 1, wherein
the pulsating control of the shut-off element is releasable upon exceeding of operating conditions.
6. The apparatus according to claim 1, further comprising
means for connecting a signal, emitted by the digital control device, with a signal provided further for turning off the diesel motor, said connecting means being connected between the shut-off element and an output, provided for the shut-off element, of the digital control device.
7. The apparatus according to claim 1, wherein
the digital control device stores various predetermined rotational speeds, to which rotational speeds the motor is controlled, depending upon the type of an existing defect.
8. A failsafe apparatus operable with an injection pump of a diesel motor, wherein the injection pump has an output setting element and a shut-off element, each of said elements comprising a mechanical actuator, the apparatus further comprising a digital control device, and wherein
the output setting element is regulatable by the digital control device;
in case of a failure of the output setting element, the output setting element is releasable from the digital control device; and
the shut-off element is pulsatingly controllable from the digital control device to attain a predetermined rotational speed of the diesel motor.
9. The apparatus according to claim 8, wherein
the digital control device and the shut-off element form a two point controller.
10. The apparatus according to claim 8, further comprising
a positioning member operable with a suitable engine cycle frequency for achieving a linear setting behavior.
11. The apparatus according to claim 8, wherein
the pulsating control of the shut-off element is releasable upon exceeding of operating conditions.
12. The apparatus according to claim 8, further comprising
means for connecting a signal, emitted by the digital control device, with a signal provided further for turning off the diesel motor, said connecting means being connected between the shut-off element and an output, provided for the shut-off element, of the digital control device.
13. The apparatus according to claim 8, wherein
the digital control device stores various predetermined rotational speeds, to which rotational speeds the motor is controlled, depending upon the type of an existing defect or failure.
US07/072,132 1986-08-28 1987-07-10 Control apparatus for an injection pump Expired - Fee Related US4823751A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3629265 1986-08-28
DE19863629265 DE3629265A1 (en) 1986-08-28 1986-08-28 ARRANGEMENT WITH AN INJECTION PUMP

Publications (1)

Publication Number Publication Date
US4823751A true US4823751A (en) 1989-04-25

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ID=6308370

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/072,132 Expired - Fee Related US4823751A (en) 1986-08-28 1987-07-10 Control apparatus for an injection pump

Country Status (5)

Country Link
US (1) US4823751A (en)
EP (1) EP0257264B1 (en)
JP (1) JPS63113156A (en)
BR (1) BR8704422A (en)
DE (2) DE3629265A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5265569A (en) * 1990-09-28 1993-11-30 Hitachi Construction Machinery Co., Ltd. Prime mover rotational speed control system
US5345915A (en) * 1991-10-10 1994-09-13 Robert Bosch Gmbh Control system for the electric fuel pump of an internal combustion engine
WO1994021911A1 (en) * 1993-03-22 1994-09-29 Davis Family Trust Combined diesel and natural gas engine fuel control system and method of using such
US5388562A (en) * 1992-05-08 1995-02-14 Zexel Corporation Fuel injection control system for internal combustion engine
US5535712A (en) * 1993-12-16 1996-07-16 Shin Caterpillar Mitsubishi Ltd. Device for controlling an engine
US10774762B2 (en) * 2017-03-06 2020-09-15 HELLA GmbH & Co. KGaA Purge pump system with emergency stop

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3844286C2 (en) * 1988-12-30 2002-03-07 Bosch Gmbh Robert Safety emergency operation method and safety emergency operation device for diesel internal combustion engines
DE4207319C2 (en) * 1992-03-08 1994-06-16 Elsons Produktions Und Handels Actuator for speed-limiting control of a motor vehicle

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3693603A (en) * 1969-12-13 1972-09-26 Bosch Gmbh Robert Control system for fuel control under starting and excessive speed conditions in an internal combustion engine
US3915130A (en) * 1973-08-28 1975-10-28 Nippon Denso Co Electric control circuit system for internal combustion engines
US3916854A (en) * 1972-06-26 1975-11-04 Barton R E Fuel-flow limiting apparatus
US4150654A (en) * 1977-08-11 1979-04-24 Caterpillar Tractor Co Engine and fuel shutdown control
US4177516A (en) * 1977-02-15 1979-12-04 Shaw Gmc Trucks Ltd. Electronic digital governor
US4497294A (en) * 1982-09-16 1985-02-05 Diesel Kiki Co., Ltd. Electronically controlled governor for diesel engines
US4690114A (en) * 1984-08-11 1987-09-01 Robert Bosch Gmbh Speed governing system for a fuel injected internal combustion engine, especially a diesel engine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57193729A (en) * 1981-05-25 1982-11-29 Nissan Motor Co Ltd Fuel shutoff device of fuel injection pump
DE3130094A1 (en) * 1981-07-30 1983-02-17 Robert Bosch Gmbh, 7000 Stuttgart EMERGENCY CONTROL SYSTEM FOR A DIESEL INTERNAL COMBUSTION ENGINE
DE3603571A1 (en) * 1986-02-06 1987-08-13 Bosch Gmbh Robert EMERGENCY DRIVING DEVICE FOR A DIESEL INTERNAL COMBUSTION ENGINE WITH ELECTRONICALLY CONTROLLED FUEL MEASUREMENT

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3693603A (en) * 1969-12-13 1972-09-26 Bosch Gmbh Robert Control system for fuel control under starting and excessive speed conditions in an internal combustion engine
US3916854A (en) * 1972-06-26 1975-11-04 Barton R E Fuel-flow limiting apparatus
US3915130A (en) * 1973-08-28 1975-10-28 Nippon Denso Co Electric control circuit system for internal combustion engines
US4177516A (en) * 1977-02-15 1979-12-04 Shaw Gmc Trucks Ltd. Electronic digital governor
US4150654A (en) * 1977-08-11 1979-04-24 Caterpillar Tractor Co Engine and fuel shutdown control
US4497294A (en) * 1982-09-16 1985-02-05 Diesel Kiki Co., Ltd. Electronically controlled governor for diesel engines
US4690114A (en) * 1984-08-11 1987-09-01 Robert Bosch Gmbh Speed governing system for a fuel injected internal combustion engine, especially a diesel engine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5265569A (en) * 1990-09-28 1993-11-30 Hitachi Construction Machinery Co., Ltd. Prime mover rotational speed control system
US5345915A (en) * 1991-10-10 1994-09-13 Robert Bosch Gmbh Control system for the electric fuel pump of an internal combustion engine
US5388562A (en) * 1992-05-08 1995-02-14 Zexel Corporation Fuel injection control system for internal combustion engine
WO1994021911A1 (en) * 1993-03-22 1994-09-29 Davis Family Trust Combined diesel and natural gas engine fuel control system and method of using such
US5370097A (en) * 1993-03-22 1994-12-06 Davis Family Trust Combined diesel and natural gas engine fuel control system and method of using such
US5535712A (en) * 1993-12-16 1996-07-16 Shin Caterpillar Mitsubishi Ltd. Device for controlling an engine
US10774762B2 (en) * 2017-03-06 2020-09-15 HELLA GmbH & Co. KGaA Purge pump system with emergency stop

Also Published As

Publication number Publication date
EP0257264B1 (en) 1990-11-28
DE3629265A1 (en) 1988-03-10
EP0257264A2 (en) 1988-03-02
EP0257264A3 (en) 1988-05-04
JPS63113156A (en) 1988-05-18
DE3766446D1 (en) 1991-01-10
BR8704422A (en) 1988-04-19

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Legal Events

Date Code Title Description
AS Assignment

Owner name: VDO ADOLF SCHINDLING AG, GRAFSTRASSE 103, 6000 FRA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:PFALZGRAF, MANFRED;STOLL, BERNWARD;PROBST, KURT;AND OTHERS;REEL/FRAME:004740/0170

Effective date: 19870520

Owner name: VDO ADOLF SCHINDLING AG,GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PFALZGRAF, MANFRED;STOLL, BERNWARD;PROBST, KURT;AND OTHERS;REEL/FRAME:004740/0170

Effective date: 19870520

Owner name: VDO ADOLF SCHINDLING AG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PFALZGRAF, MANFRED;STOLL, BERNWARD;PROBST, KURT;AND OTHERS;REEL/FRAME:004740/0170

Effective date: 19870520

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19930425

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362